add pull request panel

crates/workspace/src/image_cache.rs

@@ -1,23 +1,3 @@
-//! The shared image cache used by every `img` element in the app.
-//!
-//! Without an explicit cache, images (the profile pictures shown by
-//! `Avatar`s) fall back to the window's asset cache and are retained for the
-//! lifetime of the window: every avatar that was ever shown stays decoded in
-//! memory. This module installs one bounded LRU cache that the app controls
-//! instead:
-//!
-//! * The cache holds at most [`MAX_IMAGES`] entries; loading a new image
-//!   evicts the least recently used one. Entries remember the [`Resource`]
-//!   they were loaded from, so eviction drops the image from the sprite
-//!   atlas *and* removes the asset from the asset system — freeing the raw
-//!   fetched bytes alongside the decoded image.
-//! * [`clear_on_release`] drops the whole cache when an image-heavy view
-//!   (`RepoDetailView`, `IssuesView`) is released, i.e. its panel closes.
-//! * [`clear`] drops everything on demand from anywhere in the app.
-//!
-//! Images that get cleared are re-fetched and re-decoded the next time they
-//! are rendered, so clearing trades a little bandwidth/CPU for memory.
-
 use std::collections::{HashMap, VecDeque};
 use std::mem::take;
 use std::sync::Arc;